Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Novel hydroxide lanthanum-modified hydroxyapatite material and preparation method and application thereof

A technology of hydroxyapatite and lanthanum hydroxide, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problem of low phosphate removal rate and adsorption efficiency, which have not been reported, Small adsorption capacity and other problems, to achieve the effect of no secondary pollution risk, wide application range and strong adsorption capacity

Active Publication Date: 2018-12-21
NANCHANG HANGKONG UNIVERSITY
View PDF9 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of phosphorus removal, the dosage of materials is relatively large, the adsorption capacity is small, and the removal rate and adsorption efficiency of phosphate are low.
[0006] In addition, rare earth metal elements loaded on hydroxyapatite have not been reported

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel hydroxide lanthanum-modified hydroxyapatite material and preparation method and application thereof
  • Novel hydroxide lanthanum-modified hydroxyapatite material and preparation method and application thereof
  • Novel hydroxide lanthanum-modified hydroxyapatite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1) Add lanthanum chloride to the container, add deionized water to achieve a solid-to-liquid ratio of 1:80, and adjust the pH to 4.5 with 0.075mol / L hydrochloric acid solution;

[0052] 2) Add hydroxyapatite solution to make the lanthanum-calcium mass ratio of the mixed solution 10:1, adjust the pH of the mixed solution to 9 with 0.2mol / L NaOH solution, and stir for 2 hours;

[0053] 3) Put the stirred mixed solution into an ultrasonic instrument for ultrasonication, and adjust the ultrasonic intensity to 100W / m 2 Ultrasound 4h;

[0054] 4) Continue stirring the ultrasonically mixed solution on the stirrer at a stirring rate of 200rpm for 3.5h;

[0055] 5) Stop stirring, and seal and age for 6 hours;

[0056] 6) Pour off the supernatant of the aged solution and leave the precipitate, wash the precipitate repeatedly with deionized water until neutral, and filter it quickly;

[0057] 7) Put the filtered residue into a blast oven, dry it at 70°C for 24h, and then bake i...

Embodiment 2

[0065] 1) Add lanthanum chloride to the container, add deionized water to achieve a solid-to-liquid ratio of 1:100, and adjust the pH to 5 with 0.1mol / L hydrochloric acid solution;

[0066] 2) Add hydroxyapatite solution to make the lanthanum-calcium mass ratio of the mixed solution 1:1, adjust the pH of the mixed solution to 10 with 0.1mol / L NaOH solution, and stir for 3 hours;

[0067] 3) Put the stirred mixed solution into an ultrasonic instrument for ultrasonication, and adjust the ultrasonic intensity to 200W / m 2 Ultrasound 1h;

[0068] 4) Continue stirring the ultrasonically mixed solution for 5 h at a stirring rate of 150 rpm on the stirrer;

[0069] 5) Stop stirring, seal and age for 8 hours;

[0070] 6) Pour off the supernatant of the aged solution and leave the precipitate, wash the precipitate repeatedly with deionized water until neutral, and filter with suction;

[0071] 7) Put the filter residue obtained by suction filtration into a vacuum oven, dry at 75°C fo...

Embodiment 3

[0078] 1) Add lanthanum chloride to the container, add deionized water to achieve a solid-to-liquid ratio of 1:120, and adjust the pH to 6 with 0.2mol / L hydrochloric acid solution;

[0079] 2) Add hydroxyapatite solution so that the mass ratio of lanthanum to calcium in the mixed solution is 1:5, adjust the pH of the mixed solution to 12 with 0.075mol / L KOH solution, and stir for 4 hours;

[0080] 3) Put the stirred mixed solution into an ultrasonic instrument for ultrasonication, and adjust the ultrasonic intensity to 250W / m 2 Ultrasonic 0.5h;

[0081] 4) Continue stirring the ultrasonically mixed solution for 18 hours at a stirring rate of 80 rpm on the stirrer;

[0082] 5) Stop stirring, and seal and age for 5 hours;

[0083] 6) Pour off the supernatant of the aged solution and leave the precipitate, wash the precipitate repeatedly with deionized water until neutral, and filter with suction;

[0084] 7) Put the filter residue obtained by suction filtration into a vacuum ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a novel hydroxide lanthanum-modified hydroxyapatite material and a preparation method and application thereof. The preparation method comprises the following steps of dissolving lanthanum chloride or lanthanum oxide into an acid solution, adding hydroxyapatite, and adjusting the pH (potential of hydrogen) value of the mixed solution to the alkaline property by an alkaline solution; putting the mixed solution after stirring into an ultrasonic device, and treating by ultrasonic waves for a period of time; putting onto a stirrer, and continuing to stir for a certainperiod of time; sealing, aging, filtering, and drying, so as to obtain filter slag; roasting at high temperature, so as to obtain the novel hydroxide lanthanum-modified hydroxyapatite material. The novel hydroxide lanthanum-modified hydroxyapatite material has the characteristics that the particle size is controllable, the specific surface area is large, the hole size of the particle is large, and the loading is uniform; the material is applied to remove the phosphate radicals in wastewater, the removal rate of phosphate radicals reaches 97.5% or above, and the purpose of high-efficiency andhigh-load phosphor removal is realized.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and relates to an adsorbent material and a method for removing phosphate in wastewater, in particular to a novel lanthanum hydroxide-modified hydroxyapatite material and its preparation method and application. Background technique [0002] Phosphorus is one of the main pollutants in urban sewage. Phosphorus is an important cause of water eutrophication. Direct discharge of phosphorus wastewater will lead to serious water pollution. In 2012, the environmental status of China in 2011 reported by the Ministry of Environmental Protection showed that the eutrophication of lakes in China was a serious problem. Among the monitored lakes, 53.8% of them reached the state of eutrophication. Eutrophication of water body will lead to foul smell of water body, reduce water transparency, consume dissolved oxygen in water body, affect water supply quality and release toxic substances. The mechanism of water...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J20/06C02F1/28C02F101/10
CPCB01J20/048B01J20/06B01J2220/42B01J2220/4806C02F1/281C02F2101/105
Inventor 曾桂生李仲军魏栖梧凌波马林娟黄盛
Owner NANCHANG HANGKONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com